Struct LoopCrossingReport 

pub struct LoopCrossingReport {
    pub loops: usize,
    pub chords: usize,
    pub crossings: Vec<LoopCrossing>,
    pub unreadable: Vec<String>,
}

Outcome of loop_self_crossings.

Fields

loops: usize

Loops scanned.

chords: usize

Chords tested — the sampled trim polygon’s segments, summed over loops.

crossings: Vec<LoopCrossing>

One entry per crossing COEDGE PAIR per loop, first one found kept. The pair is the stable half: a denser sampling moves the crossing’s uv without changing which two trims cross.

Two kinds of crossing are deliberately NOT here, both because the two strands are the same curve twice rather than two parts of a boundary:

• a crossing within assembler_weld of one of the loop’s own VERTICES. Two trims arriving at one vertex are fitted independently, so each ends a fit-accuracy away from it and near the vertex they overlap. Measured over the case population on 2026-09-13, every such hit sat within 2.4e-7 of a vertex and the one true crossing sat 1.8e-1 from one — four orders of margin either side of the band, not a threshold decision. The cost is stated: a genuine bowtie whose crossing is inside that band of a vertex is not reported.
• a crossing between two DIFFERENT coedges that use the SAME EDGE — a seam edge, which a periodic face’s loop traverses once each way. The two are one 3D curve under two fits, so they cannot cross on the surface; where the fits wobble past each other they only look like it. A coedge against ITSELF is a different question and is asked.

unreadable: Vec<String>

Loops whose pcurves could not be evaluated, face/loop: reason. A scan that could not read a loop did not clear it, so a caller must not read an empty crossings beside a non-empty this as “no crossings”.

Implementations

impl LoopCrossingReport

pub fn is_flagged(&self) -> bool

The predicate: some face’s trim loop crosses itself.

pub fn summary(&self) -> Option<String>

One line naming the first crossing, or None when nothing crossed.

Trait Implementations

impl Clone for LoopCrossingReport

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LoopCrossingReport

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Serialize for LoopCrossingReport

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.